2026Q1
| Insider | Role (last 12 mo) | Shares held | Filed at |
|---|---|---|---|
| Lantheus Alpha Therapy, LLC | 10% Owner | 116,773,394 | Mar 8, 2024 |
| Lantheus Holdings, Inc. | 10% Owner | 116,773,394 | Mar 8, 2024 |
| Patel Rajiv A | Other | 3,477,227 | Aug 21, 2025 |
| Roberts Thomas G. Jr. | Other | 3,477,227 | Aug 21, 2025 |
| Saito Edric C. | Other | 3,477,227 | Aug 21, 2025 |
| Exec date | Filing date | Insider | Role | Signal | Confidence | Shares | % of shares | Under plan? | Amount (USD) |
|---|---|---|---|---|---|---|---|---|---|
| Mar 2, 2026 | Mar 4, 2026 | Niedzwiecki Daniel | Officer | Sell | 20.0 | -3,090 | -3.55% | ✗ | $630.2K |
| Mar 2, 2026 | Mar 4, 2026 | Morgan Amanda Michelle | Chief Commercial Officer | Sell | 20.0 | -554 | -1.42% | ✗ | $254.5K |
| Mar 2, 2026 | Mar 4, 2026 | Marshall Robert J. Jr. | CFO | Sell | 20.0 | -2,161 | -2.45% | ✗ | $812.7K |
| Mar 2, 2026 | Mar 4, 2026 | Heino Mary Anne | CEO | Sell | 17.5 | -9,811 | -1.64% | ✗ | $3.2M |
| Dec 15, 2024 | Dec 17, 2025 | Morgan Amanda Michelle | Chief Commercial Officer | Sell | 22.5 | -724 | -1.12% | ✗ | $57.8K |
| Nov 17, 2025 | Nov 19, 2025 | Heino Mary Anne | Chair | Neutral | 77.5 | +14,285 | 2.44% | ✗ | - |
| Aug 29, 2025 | Sep 3, 2025 | Marshall Robert J. Jr. | CFO | Sell | 36.3 | -727 | -0.82% | ✗ | $39.9K |
| Aug 19, 2025 | Aug 21, 2025 | PATEL RAJIV A | Other | Sell | 15.0 | -3,406,000 | -49.48% | ✗ | $191.2M |
| Aug 19, 2025 | Aug 21, 2025 | FARALLON PARTNERS L L C/CA | 10% Owner | Sell | 15.0 | -3,406,000 | -49.48% | ✗ | $191.2M |
| Aug 15, 2025 | Aug 19, 2025 | Brown Kimberly | Chief Accounting Officer | Sell | 26.3 | -463 | -5.67% | ✗ | $25.1K |
| Aug 15, 2025 | Aug 19, 2025 | Dinkelborg Ludger | Officer | Neutral | 90.0 | +14,765 | 100.00% | ✗ | - |
| Aug 18, 2025 | Dinkelborg Ludger | Officer | Neutral | 52.5 | - | 0.00% | ✗ | - | |
| Aug 18, 2025 | PATEL RAJIV A | Other | Neutral | 52.5 | - | 0.00% | ✗ | - | |
| Aug 18, 2025 | FARALLON PARTNERS L L C/CA | 10% Owner | Neutral | 52.5 | - | 0.00% | ✗ | - | |
| Aug 13, 2025 | Aug 15, 2025 | Blanchfield Paul | President | Sell | 41.3 | -3,060 | -2.75% | ✓ | $163.9K |
| Jul 15, 2025 | Jul 17, 2025 | Blanchfield Paul | President | Sell | 43.8 | -518 | -0.46% | ✗ | $42.1K |
| Jun 13, 2025 | Jun 17, 2025 | Niedzwiecki Daniel | Officer | Sell | 30.0 | -6,000 | -6.45% | ✓ | $472.4K |
| Jun 9, 2025 | Jun 11, 2025 | McHugh Julie | Director | Sell | 17.5 | -5,192 | -16.67% | ✓ | $423.8K |
| Jun 9, 2025 | Jun 11, 2025 | Marshall Robert J. Jr. | CFO | Sell | 5.0 | -39,773 | -30.92% | ✓ | $3.3M |
| Jun 5, 2025 | Jun 9, 2025 | Blanchfield Paul | President | Sell | 30.0 | -6,599 | -5.57% | ✓ | $525.6K |
| Jun 5, 2025 | Jun 9, 2025 | Niedzwiecki Daniel | Officer | Sell | 30.0 | -6,000 | -6.06% | ✓ | $477.9K |
| Jun 2, 2025 | Jun 4, 2025 | Heino Mary Anne | Director | Sell | 32.5 | -26,066 | -4.27% | ✓ | $2M |
| May 27, 2025 | May 29, 2025 | Heino Mary Anne | Director | Neutral | 52.5 | - | 0.00% | ✗ | - |
| May 14, 2025 | May 16, 2025 | Thrall James H | Director | Neutral | 85.0 | +2,537 | 7.64% | ✗ | - |
| May 14, 2025 | May 16, 2025 | Pruden Gary J | Director | Neutral | 90.0 | +2,537 | 11.00% | ✗ | - |
| May 14, 2025 | May 16, 2025 | Morrow Phuong Khanh | Director | Neutral | 90.0 | +2,537 | 450.62% | ✗ | - |
| May 14, 2025 | May 16, 2025 | McHugh Julie | Director | Neutral | 85.0 | +2,537 | 8.87% | ✗ | - |
| May 14, 2025 | May 16, 2025 | Maeusli Heinz Christoph | Director | Neutral | 90.0 | +2,537 | 10.87% | ✗ | - |
| May 14, 2025 | May 16, 2025 | LENO SAM R | Director | Neutral | 82.5 | +2,537 | 4.19% | ✗ | - |
| May 14, 2025 | May 16, 2025 | EASTLAND JULIA MARIE | Director | Neutral | 90.0 | +2,537 | 188.62% | ✗ | - |
| May 14, 2025 | May 16, 2025 | Heino Mary Anne | Director | Neutral | 60.0 | +2,537 | 0.42% | ✗ | - |
| May 14, 2025 | May 16, 2025 | Baylor-Henry Minnie | Director | Neutral | 90.0 | +2,537 | 34.47% | ✗ | - |
| May 14, 2025 | May 16, 2025 | Ber Gerard | Director | Neutral | 90.0 | +2,537 | 12.18% | ✗ | - |
| May 9, 2025 | May 13, 2025 | Ber Gerard | Director | Sell | 26.3 | -396 | -1.87% | ✗ | $32.4K |
| Apr 17, 2025 | Apr 21, 2025 | Blanchfield Paul | President | Sell | 43.8 | -455 | -0.38% | ✗ | $46.1K |
| Apr 17, 2025 | Apr 21, 2025 | Niedzwiecki Daniel | Officer | Sell | 51.3 | -178 | -0.18% | ✗ | $18K |
| Mar 5, 2025 | Mar 21, 2025 | Brown Kimberly | Chief Accounting Officer | Neutral | 90.0 | +3,433 | 72.56% | ✗ | - |
| Mar 17, 2025 | Mar 19, 2025 | Marshall Robert J. Jr. | CFO | Sell | 23.8 | -10,000 | -8.07% | ✓ | $1M |
| Jun 7, 2024 | Mar 17, 2025 | Heino Mary Anne | Director | Sell | 52.5 | -3 | 0.00% | ✗ | $281.5 |
| Mar 5, 2025 | Mar 7, 2025 | Morgan Amanda Michelle | Chief Commercial Officer | Neutral | 90.0 | +14,928 | 60.55% | ✗ | - |
| Mar 5, 2025 | Mar 7, 2025 | Niedzwiecki Daniel | Officer | Neutral | 90.0 | +23,884 | 31.70% | ✗ | - |
| Mar 5, 2025 | Mar 7, 2025 | Marshall Robert J. Jr. | CFO | Neutral | 90.0 | +23,884 | 23.89% | ✗ | - |
| Mar 5, 2025 | Mar 7, 2025 | Blanchfield Paul | President | Sell | 95.0 | +24,787 | 26.39% | ✓ | $204.2K |
| Mar 5, 2025 | Mar 7, 2025 | MARKISON BRIAN A | CEO | Neutral | 90.0 | +70,909 | 43.90% | ✗ | - |
| Mar 3, 2025 | Mar 5, 2025 | Niedzwiecki Daniel | Officer | Sell | 17.5 | -2,393 | -3.08% | ✗ | $1.2M |
| Mar 3, 2025 | Mar 5, 2025 | Marshall Robert J. Jr. | CFO | Sell | 17.5 | -2,987 | -2.90% | ✗ | $1.9M |
| Mar 3, 2025 | Mar 5, 2025 | MARKISON BRIAN A | CEO | Sell | 20.0 | -8,637 | -5.08% | ✗ | $819.3K |
| Mar 3, 2025 | Mar 5, 2025 | Blanchfield Paul | President | Sell | 17.5 | -2,825 | -2.92% | ✗ | $1.6M |
| Mar 3, 2025 | Mar 5, 2025 | Heino Mary Anne | Director | Sell | 42.5 | -3,037 | -0.50% | ✓ | $5M |
| Mar 3, 2025 | Mar 5, 2025 | Morgan Amanda Michelle | Chief Commercial Officer | Sell | 22.5 | -759 | -2.99% | ✗ | $72K |
| Feb 7, 2025 | Feb 12, 2025 | Morrow Phuong Khanh | Director | Neutral | 52.5 | - | 0.00% | ✗ | - |
| Feb 7, 2025 | Feb 11, 2025 | Morrow Phuong Khanh | Director | Neutral | 90.0 | +563 | 100.00% | ✗ | - |
| Feb 7, 2025 | Morrow Phuong Khanh | Director | Neutral | 52.5 | - | 0.00% | ✗ | - | |
| Jan 15, 2025 | Jan 17, 2025 | Thrall James H | Director | Sell | 41.3 | -1,000 | -2.92% | ✓ | $94.8K |
| Dec 19, 2024 | Dec 23, 2024 | MARKISON BRIAN A | CEO | Sell | 17.5 | -15,446 | -8.32% | ✗ | $1.4M |
| Nov 15, 2024 | Nov 19, 2024 | Marshall Robert J. Jr. | CFO | Sell | 26.3 | -10,000 | -8.85% | ✓ | $812K |
| Nov 14, 2024 | Nov 18, 2024 | Blanchfield Paul | President | Sell | 41.3 | -2,355 | -2.38% | ✓ | $159.3K |
| Nov 8, 2024 | Nov 12, 2024 | Heino Mary Anne | Director | Sell | 40.0 | -11,487 | -1.84% | ✓ | $1M |
| Sep 10, 2024 | Sep 12, 2024 | EASTLAND JULIA MARIE | Director | Neutral | 90.0 | +1,345 | 100.00% | ✗ | - |
| Sep 9, 2024 | EASTLAND JULIA MARIE | Director | Neutral | 52.5 | - | 0.00% | ✗ | - | |
| Aug 29, 2024 | Sep 3, 2024 | Marshall Robert J. Jr. | CFO | Sell | 32.5 | -786 | -0.69% | ✗ | $82.4K |
| Aug 21, 2024 | Aug 23, 2024 | Thrall James H | Director | Sell | 41.3 | -1,000 | -2.84% | ✓ | $98.5K |
| Aug 15, 2024 | Aug 19, 2024 | Brown Kimberly | Chief Accounting Officer | Neutral | 90.0 | +4,731 | 100.00% | ✗ | - |
| Aug 14, 2024 | Aug 16, 2024 | Niedzwiecki Daniel | Officer | Sell | 37.5 | -2,500 | -3.12% | ✓ | $243.9K |
| Aug 12, 2024 | Aug 14, 2024 | Ber Gerard | Director | Sell | 5.0 | -15,500 | -42.21% | ✓ | $1.5M |
| Aug 8, 2024 | Aug 12, 2024 | Blanchfield Paul | President | Sell | 45.0 | -2,000 | -1.98% | ✓ | $192.8K |
| Aug 12, 2024 | Brown Kimberly | Chief Accounting Officer | Neutral | 52.5 | - | 0.00% | ✗ | - | |
| Aug 2, 2024 | Aug 6, 2024 | Heino Mary Anne | Director | Sell | 40.0 | -10,481 | -1.66% | ✓ | $1M |
| Jul 15, 2024 | Jul 17, 2024 | Blanchfield Paul | President | Sell | 32.5 | -518 | -0.51% | ✗ | $63.8K |
| Jul 15, 2024 | Jul 17, 2024 | Sabens Andrea | Chief Accounting Officer | Sell | 35.0 | -2,137 | -3.42% | ✓ | $266.4K |
| Jul 10, 2024 | Jul 12, 2024 | Pruden Gary J | Director | Sell | 5.0 | -12,530 | -35.20% | ✓ | $1.2M |
| Jun 17, 2024 | Jun 20, 2024 | Humphrey Jeffrey | Chief Medical Officer | Neutral | 90.0 | +9,076 | 100.00% | ✗ | - |
| Jun 13, 2024 | Jun 17, 2024 | Sabens Andrea | Chief Accounting Officer | Sell | 51.3 | -341 | -0.54% | ✓ | $27.2K |
| Jun 6, 2024 | Humphrey Jeffrey | Chief Medical Officer | Neutral | 52.5 | - | 0.00% | ✗ | - | |
| May 31, 2024 | Jun 4, 2024 | Blanchfield Paul | President | Sell | 45.0 | -1,179 | -1.15% | ✓ | $95.3K |
| May 30, 2024 | Jun 3, 2024 | Niedzwiecki Daniel | Officer | Sell | 20.0 | -12,873 | -13.82% | ✓ | $1M |
| May 28, 2024 | May 30, 2024 | Maeusli Heinz Christoph | Director | Sell | 5.0 | -18,373 | -44.05% | ✓ | $1.5M |
| May 28, 2024 | May 30, 2024 | McHugh Julie | Director | Sell | 28.8 | -2,500 | -8.03% | ✓ | $196.3K |
| May 20, 2024 | May 22, 2024 | Pruden Gary J | Director | Neutral | 27.5 | -2,012 | -5.35% | ✗ | - |
| May 17, 2024 | May 21, 2024 | Niedzwiecki Daniel | Officer | Sell | 22.5 | -1,466 | -1.55% | ✗ | $116.8K |
| May 13, 2024 | May 15, 2024 | Sabens Andrea | Chief Accounting Officer | Sell | 51.3 | -341 | -0.54% | ✓ | $26.2K |
| May 8, 2023 | May 15, 2024 | Ber Gerard | Director | Sell | 22.5 | -629 | -1.68% | ✗ | $54.5K |
| May 9, 2024 | May 13, 2024 | Thrall James H | Director | Neutral | 85.0 | +2,635 | 8.09% | ✗ | - |
| May 9, 2024 | May 13, 2024 | Baylor-Henry Minnie | Director | Neutral | 90.0 | +2,635 | 55.77% | ✗ | - |
| May 9, 2024 | May 13, 2024 | Ber Gerard | Director | Neutral | 85.0 | +2,635 | 7.59% | ✗ | - |
| May 9, 2024 | May 13, 2024 | Maeusli Heinz Christoph | Director | Neutral | 85.0 | +2,635 | 9.11% | ✗ | - |
| May 9, 2024 | May 13, 2024 | Pruden Gary J | Director | Neutral | 85.0 | +2,635 | 8.00% | ✗ | - |
| May 9, 2024 | May 13, 2024 | LENO SAM R | Director | Neutral | 82.5 | +2,635 | 4.55% | ✗ | - |
| May 9, 2024 | May 13, 2024 | McHugh Julie | Director | Neutral | 85.0 | +2,635 | 9.25% | ✗ | - |
| May 9, 2024 | May 13, 2024 | Heino Mary Anne | Director | Neutral | 60.0 | +2,635 | 0.42% | ✗ | - |
| Apr 17, 2024 | Apr 26, 2024 | Niedzwiecki Daniel | Officer | Sell | 51.3 | -177 | -0.19% | ✗ | $10.9K |
| Apr 17, 2024 | Apr 19, 2024 | Blanchfield Paul | President | Sell | 43.8 | -455 | -0.44% | ✗ | $28K |
| Apr 15, 2024 | Apr 17, 2024 | Sabens Andrea | Chief Accounting Officer | Sell | 51.3 | -341 | -0.54% | ✓ | $20.9K |
| Apr 4, 2024 | Morgan Amanda Michelle | Chief Commercial Officer | Neutral | 52.5 | - | 0.00% | ✗ | - | |
| Mar 15, 2024 | Mar 19, 2024 | Marshall Robert J. Jr. | CFO | Sell | 20.0 | -20,000 | -14.95% | ✓ | $1.2M |
| Mar 13, 2024 | Mar 15, 2024 | Sabens Andrea | Chief Accounting Officer | Sell | 51.3 | -341 | -0.54% | ✓ | $20.6K |
| Mar 7, 2024 | Mar 11, 2024 | Blanchfield Paul | President | Sell | 15.0 | -18,523 | -15.26% | ✓ | $1.1M |
| Mar 6, 2024 | Mar 8, 2024 | Lantheus Alpha Therapy, LLC | 10% Owner | Buy | 100.0 | +60,431,039 | 107.26% | ✗ | $57.4M |
| Mar 5, 2024 | Mar 7, 2024 | Provost Jean-Claude | Chief Medical Officer | Sell | 26.3 | -546 | -1.39% | ✗ | $35.7K |
| Mar 5, 2024 | Mar 7, 2024 | LENO SAM R | Director | Sell | 42.5 | -4,090 | -1.38% | ✓ | $262K |